Process of making coil-cleaning brushes



Feb. 24, 1931. J ANDERSON 1,793,768

PROCESS OF MAKING COIL CLEANING BRUSHES Filed March 28, 1930 w INVENTOR.

Jase I fl/vofirsm A TTORNEYS.

Patented Feb. 24, 1931 UNITED f STATES PATENT OFFICE JESSE I; ANDERSONOF INDIANAPOLIS, INDIANA, ASSIGNOR T J. I. HOLGOMB MANU- FACTURINGCOMPANY, OF INDIANAPOLIS, INDIANA, A CORPORATION PRocEss or MAKINGCOIL-CLEANING BRUSHES Application filed March 28, 1930. Serial No.439,552.

This invention relates to the process of forming. a coil cleaning brush.

The chief object of the invention is to produce a brush which is notonly adapted to cleaning rotatable pipes but also rotatable coils forremoving scale, incrustations and deposits exteriorly included thereon.

The chief feature of the invention consists in the several steps of theprocess whereby to a brush suitable for the aforesaid purposes isproduced in an economical and etficient manner.

The full nature of the invention will be understood from theaccompanying drawings 1-) and the following description and claims.

Fig. 1 is an elevational view of an initial brush blank or body, thedotted portions representing the trim. Fig. 2 represents, anintermediate step of the process and shows the as offsettin of the brushbody intermediate its ends. i 3 is another step in the process showing t1e compressed S-shaped formation of the brush body. Fig. 4 illustrates asuccessive step of the process and the bending of 25. the free anchoringends into parallel position and transverse to the plane of the S-shapedbody. Fig. 5 illustrates on a slightly smaller scale the transverseanchorage of a handle to the compressed S-shaped brush body through sothe parallel but transverselyarranged free ends and in figure eightformation. Fig. 6

is an elevational view of the final position assumed by the brush bodyand mounting thereof upon a coil together with a protective 3'5. sleeve.

In the drawings there is illustrated a wire rod construction havingconsiderable resiliency. The rod construction is comprised of twotwisted strands of wire 10. In the twist 405i ing of the strands thereis secured intermediate the ends of the coil a plurality of radiallyprojecting bristles 11, which, upon formation of the rough blank or bodywith the proj ecting ends, has the bristles trimmed so that 45? anycross section is of circular formation and herein the brush body blankis shown substantially cylindrical as at 12.

WVhile not necessary, in order to secure a brush having suflicientbristle body at the {illpoint of greatest wear, said blank is offset astransverse to the handle.

indicated at 13 in Fig. 2 and this offsetting is intermediate the endsof the brush body blank leaving the intermediate body portions offsetfrom each other. a

Each intermediate body portion that is included between the offsetmid-portion of the brush body and the rod end is reversed by beinghentback upon itself as at 14 and preferably so that the remote ends ofeach of the intermediate body portions slightly overlap the centralportion of the brush and each other, and if offset, nest with the offsetportion of the brush.

Theexposed rod ends are turned alignlarly as at 15 into substantialparallel relation and transverse to the plane of the substantiallyS-shaped brush body previously formed. This step of the process isillustrated in Fig. 4;. i

The two wire ends of the brush are then compressed laterally toward eachother so as to be anchored to a handle 16 positioned sub stantiallytransverse to the central and off set portion of the brush body. Hereinthe two wire ends 15 straddle said handle and are seated in grooves 17thereof which grooves are diametrically arranged in the handle. Anelongated helix l8 suitably anchors the brush body to the handle bybinding the transverse rod ends 15 thereto.

The brush in this form is substantially figure-3 shaped without anyopenings in the loops. Each wing 19 of the figure-8 shaped body is thencurled in semicylindrical formation as shown in Fig. 6 and both wingsare curled toward each other, forming the throat 20 with the bristles atthe ends of the wings just missing each other. When thus positioned acylindrical opening 21 is formed within the brush body and said openingWhen the brush is presented to a coil or pipe, said pipe passes throughthe throat 20, nests in the opening 21 and the brush substantiallyencircles said pipe so that if the pipe rotates the entire teriorsurface of said pipeor coil 22 is cleaned providing the brush is fedlongitudinally. of the pipe or coil.

In pasteurizing of milk, such coils are steam coils and the milk to bepasteurized shield in the form of a sleeve 23 is mounted upon the handleadjacent the Wire anchorage 18 so that no hard metal is exposed to thesilvered or nick-eled surfaces for destroying the protective coatingthereof.

It Will be noted, that since pressure is applied longitudinally of thehandle to the coil through the brush, that the brush portion taking thegreatest strain is that which includes the ofi'set portion and the tWooverlapping end portions so that the portion of the brush vvhichreceives the greatest Wear is the portion of; the brush that includesthe greatest amount of bristle, to-wit, substantially half again as muchas any other portion. A brush manufactured in this manner has theadditional advantage that at the throat there is-no projecting Wire end,all of thewire body portion is protected by bristle and there is no freeend for protective surface inarring or removal. Furthermore, formationof a brush in this manner forms a brush that is adapted to accommodatepipes of varying sizes and effectively clean the same if Within thelimit of accommodation of the-brush. In other Words, if the brush inchor even atWo-inch pipe because the ends 1 19 of the brush Will spreadsufficient to accommodate the reception .of the larger size pipe andform a larger central opening 21.

The invention claimed is: o 1. The process of forming a brush f0cleaning coils and the like, consisting of forming an elongated bristlebearing member having a core and projecting anchoring ends of Wire,bending the elongated member into substantially S-shaped arrangement,securing the s-shaped member in substantially flattened figure-8arrangement and to a handle and then bending the Wings of the figure-8shaped blank semi-circularly toward each other to form a pipe receivingthroat and a substantially circular pipe nesting central opening Withthe throat opposite the handle anchorage.

2. The process of making a brush for cleaning coils consisting ofinitially forming a core bristle body substantially circular in crosssection throughout its length and terminating in bristleless projectinganchoring ends, forming an oifset substantially midway of the bristlebody core, reversely bending each body portion of the core interme diatethe oifset'portion and the end such that the end overlaps the offsetportion anchoring the bristleless ends of the body to a handle andsubstantially transverse to the plane of the overlapping portions, andthen bending each projecting portion of the body into semi-circularformation so that the sa -e form a substantially cylindrical brush bodyof a Width double the core diameterand of triple strength adjacent thehandle anchorage.

In Witness whereof, I have hereunto affixcd my signature.

- JESSE I. ANDERSON.

